package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setMealMapper;

    @Override
    public R delete(Long id) {
        //1.检查该分类下是否有对应的菜品数据,有则不能删除
        LambdaQueryWrapper<Dish> dishqw = new LambdaQueryWrapper<>();
        dishqw.eq(Dish::getCategoryId, id);
        Integer count = dishMapper.selectCount(dishqw);
        if (count > 0) {
            return R.error("很抱歉,当前分类下有菜品,不能删除!");
        }

        //2.检查该分类下是否有对应的套餐数据,有则不能删除
        LambdaQueryWrapper<Setmeal> setMealqw = new LambdaQueryWrapper<>();
        setMealqw.eq(Setmeal::getCategoryId, id);
        count = setMealMapper.selectCount(setMealqw);
        if (count > 0) {
            return R.error("很抱歉,当前分类下有套餐,不能删除!");
        }
        //3.删除分类
        int result = categoryMapper.deleteById(id);
        return result > 0 ? R.success("删除分类成功") : R.error("删除分类失败");
    }
}
